> Like Git, Fossil has an amend command for modifying prior commits, but unlike in Git, this works not by replacing data in the repository, but by adding a correction record to the repository that affects how later Fossil operations present the corrected data.

I may be misreading this, but what if I accidentally commit (not push) a piece of sensitive data (say a private key), but notice before I commit. In Git, I would simply remove it, and amend, and it is now gone from the Git history. It sounds like with Fossil, it would remain in the history, or am I misunderstanding something?

There are times where being able to rewrite the history is critical.